AD Amdt-39-11205
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Model S-76A | Airworthiness Directives; Sikorsky Aircraft Model S-76A Helicopters |
| engine | Turbomeca | Arriel 1S1 | Airworthiness Directives; Sikorsky Aircraft Model S-76A Helicopters |
Unsafe Condition
Sikorsky Aircraft Model S-76A helicopters with Turbomeca Arriel 1S1 engines may fail to achieve the specified single-engine rotorcraft performance if an AC generator interlock system is not installed.
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Required Actions
Before further flight, revise the flight manual to show reduced single-engine rotorcraft performance unless an AC generator interlock system is installed. If an interlock system is installed, the flight manual revision is not required.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Sikorsky Aircraft Model S-76A helicopters with Turbomeca Arriel 1S1 engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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